Pipe guide for diestocks



May 17', 1.932 B. T.'BRDEN 1,858,850

PIPE GUIDE FOR DIESTOCKS Filed Sept. 18, 1930 /Z Je 2 'Vaca-.1.4

:Ei/)5% m F1/6.15 3%? L/eaf/fr-V7 im Patented May 17, 1932 Lassen UnirseSTATES PAT- ENT @Fries i" BRADFORD T. BORDEN, OF" LAKEWOOD, OHIO,ASSIGNOR. OF l0'NIEf-I-IAIM? 10 THE BORDEN COMPANY, OF WARREN, OHIO, .ACORPORATION OF OHIO,

' LIAM A. NERACHER, OF WARREN, OHIO PIPE GUIDE rony nrEsTocKs IApp1ia'-ion sied september 1s, 1930. ysemi 110.482,760.

This invention relates to adjustable guides for die stocks andsimilartoolsV adapted to act on pipes of several sizes; -Die stocks of thischaracter having for instance,adjustable chasers settable for cuttingvseveral sizes of piperequirepipefguides or'work holders'correspondingly variable for different pipe sizes.' To avoidfthecumbersomeness of interchangeablebushings to be loosened and removedYi'romthedie stoclgmy invention providesfan adjust'ablepipe guidemounted on the die stock and settable'for vdiierent sizes of pipe. Thisguide comprises a 'pair of blocks having ynotches of varying depth Vandmounted individually on opposite sides of the pipe airis, v4sol thatdiierentpairs of notches can be brought into position'to producedifferent pipe openings by giving the blocks partial rotations.

It lis theobject of the A toiprovideV such nblocks ,in the `form wherebythey may lbe very easily changed frofrnone size tol another and at thesame time when set, will be rigidly held position.V The .means by whichI accomplish this will be hereinafter more fully ,explainedwith 'adescription of V'the preferred embodiment illustrated my pipe guidemountedon la die stock; Fig.V 2 is a view ofthe opposite faceof the dieAstock showing by way of illustrationmy arrangementfor adjusting thechasers; Fig. 3 is an edge `view of the die stock equipped with my pipeguide; Fig. 4c is alongitudinal `central section through thedie stockina planepar? lallel with'Fig; 3;A Fig. 5 is a detail incross sectionthroughl the pipe guide itselfandfis indicated bythe line 5-,5 on Fig.1'.

As shown in the drawings, 10 indicates a suitable frame of a, die stock.This carries on `one end suitable threading devices tol .be

hereinafterdescribed, .and on thejother end my pipe guide. Forthelatter' purpose, the frame is formedwith an outwardlyextending -flatrectangular portion 11 bounded-on opposite sides by outwardly projectingpar' allel ribs 12, thus producing awide shallow t' outwardlyfacingchannel 13 within'which present .inventionV .um ONE-HALF Vmo WIL-'increasing depth. The dimensionV across.

the block 20 is only slightly less than the width of the guide channel13, so that when the blockis seated within the channel,` it iseffectively held by the side ribs 12.

Each blocl20 is held tothe die stock frame by a pin 25 shown-as passingthrough acentral hole in the bloclr and screwing into the mid-region ofthefiattened Vportion 11. This pin has a head 26 which occupies a recess27 in the block and somewhat larger rthan Vthe pin, thisrecess extendingfrom the outer face to a point near the inner face of the block. Thereis thus anl annularV space around the pinibetweeny the head of thescrewand Athe inner portion of the block which embraces the screw." In thisspace is mounted a helical `compression spring 294which serves to retainthe block normally'against the plate/11 of 'the' diefstock so that eachblock is held withinthechannell and locked against rotation by the ribs12.

` It wil'lbe readily seen that to change v'the blocks 20 for differentsizes of pipe, it is only necessary for the operator to grasp a blockwith his fingers kengaging a pair of opposite recesses therein, lpullthe blocks voutwardly a Vslight distance against the action of thespring 29 'and then'give` the block` a partial rotation, that is' tosay, a quarter or half turn in 'one direction or the other,v as may berevquired to bringL anew notch into Vcoopera- 'tion with the otherblock. VBy this means any pair of notches may beselected in the twoblocks and caused towoccupy'cooperating positions on opposite sidesofthe pipe axis and centralized therewith. f

ItV is very convenient to` make adjustable die, stocks forfour'sizes ofpipe as ls uch adjustment meets'a. large numberof practicalrequirements, thus aV comparatively small die Vstocklmay be'made for thesize iofilrf, 5%",

An'y suitable form of'pipe'threading inem-V bers `may be mounted onthedie stock to coo-perate with my pipe guide I have shown herein simply byway of illustration, the form shown and claimed in my copendingapplication No. 447 ,212 filed-April th, 1930. As shown in thatapplication I have provided on the end of the die stock frame, suitableradial` housings made by pairs of opposed outwardly projecting lugs 15and 16. Be-

.V tween these lugs are mounted radial chasers Yso 30. Each chaser isprovided with cutting teeth V31 Von its opposite ends. Projecting fromthe Vchaser nearer one end than the other is an outwardly extending pin32.

Secured to some of the housing lugs of the die stock frame,is an annularclamping plate 35 which, by overlying the lugs, holds the chaserstherein against longitudinal movement. This clamping plate isshownasprovided with three notches 36, 37 and 38 of different depth. Anynotch may cooperate with a pin 32 vof the corresponding chaser. To holdthe clamping plate in any of its different positions land allow it to bereadily shifted, it is convenient to make arcuate slots 39 in theplateand. extend through these slots clamping screws 4;() whicharethreadedl in a pair of diametrically .opposite housing lugs 16. Byshoving the" chasers inward to carry the pins 32Iout'of'whatever'notches they' occupy, and by loosening theclamping-screws, the annular plate be readjusted to present differentnotches in line with the chasers so that they may Ythen be brought backinto a different radial position with-the pins abutting the outer endsof the notches. VVhen'so adjusted, the chasers maybe clamped by thetightening of the screws 40. Y

Though only three notches 3 37 and 38 are shownin the clamping plate inFig. 2, it will be observed that byl reason of the double ended chasers,and the fact that the'pins are nearer one end of the chasers than theother,

that Iv can accomplish four sizes of pipe by .this arrangement, forinstance, with the Chaser-turned to bring the end which is incre distantfrom the pin inwardly and a separate i .chaser for the smallest sizeYpipe, when the -chaser pin occupies the ynotchz36 and with the next sizepipe whenthe chaser occupies the notch 37, then by turning the chaserend for end l may Yset the die stock for the third sizepipewith-the pinoccupying the same intermediate notch 37, and for the fourthl or largestsize pipe with the pin occupying the third-notch 38. Y

The complete die stock illustrated in the drawings is an extremelysimple tool, one single integral casting forming the frame of the diestock, the frame of the pipe guide and the guides for the chasers. It isonly necessary then to equip such frame on one side of the chasers withsuitable clamping means and on the other with my guiding blocks and'their holding springs and screws. A It should be understoodhowever,that my guide,though preferably having its frame integral withthe die stock frame, may be made separate therefrom' andl suitablyscrewed thereto. Of course my guide is not limited to any particularform of holding and positioning mechanism for the chasers.

. rl'. claim 1. The combination with a frame having an opening for thepassage of a pipe, a pair of blocks having non-circular exteriors andthe frame being provided with fixed means to engage such exteriors andhold the blocks in anyl one of several positions, said blocks havingnotches of different depth in their periphery, selected ones of whichmay register with the pipe opening, and means for permanently holdingthe blocks to the frame -while allowing their movement to presentdifferent notches.

2. A pipe guide comprising a frame having a pipe opening, a pair ofblocks pivotally mounted -on the frame onV axes on opposite sides of thepipe axis, said blocks having noncircular exteriors, and non-concentricribs onthe frame adapted to engage portions of such exteriors fornormally holding the blocks against rotation, said blocks havingperipheral notch-es of dierent depth, so that different notchesin thetwo blocks maybe brought into -cooperative registration with the pipe.opening of the frame, and means for pivotally securing the blocks tothe frame While allowing their axial movement for a greater distancethanthe height of the ribs.

` 3. A pipe guide comprising a frame, a pair .of parallel edge flanges,ya pair of blocks substantially square in extreme external dimensions butrecessed in each face, said blocks being adapted to be held between theanges with any selected recess of one block adjacent that of the otherblock, the diderent recesses in the block being of different depth, saidblocks being permanently pivoted at their centers but movable axially toclear the edge flanges. j

t. In a die stock,` the combination of a frame, a pair of blocks havingnotches in their periphery, a pair of pins Vfor pivoting said blocks tothe frame, each pin having a head occupying a recess on the outer face'of the block which does Vnot extend completely vthrough the block, anda compression spring within the recess surrounding the pin between itshead and the base of the recess, and

means for holding the block. in any one of a lib numb-er of positionswhen it is pressed inwardly by the spring.

5. In a device of the character described, the combination of a framehaving a pipe opening and a iiat rectangular portion, a pair ofoutwardly facing ribs at the edge of the rectangular portion, a pair ofblocks having square boundaries pivotally mounted within the channelprovided by the flat portion and ribs, the distance across'said blocksbeing slightly less than the width of the channel, each block beingpivoted by a pin extending through its center into the channel, acompression spring surrounding the pin and held by a head on the pinwhereby the spring normally retains theV block against the base of thechannel and thus holds the block in xed position but allows the block tobe drawn outlowed'by the heads on the pins.

them'in any one of avnurnber of positions Y when the blocks are pressedinwardly by the springs but clearing the blocks when the latter aredrawn outwardlyV to the extent al- In testimony whereof, I hereuntoaiiix signature.

' BRADFORD T. BORDEN. Y

wardly further than the ribs at the edge of Y the' channel', whereby theblock may be rotated and repositioned, each block having in its edgerecesses of several depths, whereby a combined recess corresponding toseveral sizes ofrpipe may be obtained.

6. The combination of an annular frame having a pipe opening, threadingmeans carried by the frame on one side, a' flat rectangular portionforming an integral part of the frame on the other side and extendingtransversely of the opening, a pair `of `outwardly facingl ribs formedintegrally with the rectangular portion at opposite edges thereof toprovide a shallow outwardly facing channel, a pair of blocks materiallythicker than the height of the ribs and having square boundariespivotally mounted within the channel, the distance across said blocksbeing l slightly less than the width of thechannel,

each block being pivoted by a pin extending through its center intothe'channel, a compression spring surrounding the pin and held in arecess in the block with suiiicient play to A suitable frame, of a pairof blocks mounted allow the block to clear the ribs, whereby the springnormally retains the block against the base of the channel and thusholds the block Y depths.

7 Ina pipe guide, the combination with a myv on opposite sides ofthepipe axis and having notches of dii'erent depth in their periphery,Vshoulders on the frame Vfor locking said blocks Y in any one ofapluralityl of active positions,V Aand springmeans tending tohold theblocks in engagement with thevshoulders but allQwing them to bewithdrawn therefrom turned to another position.

and

8. vIn a die stock, the combination' o`f a` v frame, a pairV of blockshaving notches 1n l their periphery, a pair of pins carried by the framefor pivoting said blocks tothe frame,

lasl

